I know this is not an uncommon issue and have read multiple theories. I have done the low hanging items, like re-seating the power cables. Before I pull the power board and start reflowing solder or replacing capacitors I am hoping someone with more knowledge than me can narrow this down based on specific symptoms.

The game will reset Consistently if both flippers (all 3) are activated at the same time, TWICE in a row.
If both are activated one time, the reset is seemingly random.

My question is, does this point toward the capacitors as it seems that the stress of the double press twice in a row triggers it every time??
One of the capacitors has been replaced with a 35v, so it may have been an issue in the past.

Thanks for any insight/opinions/experience or even just jabbing me for my naive expectation of an easy absolute diagnosis!

#2 4 years ago

---

ForceFlow

Pinside Moderator

9y 238K 31,334 268 14

WPC game resets are fairly common, and can have several possible causes. There is a troubleshooting procedure here:

https://www.pinwiki.com/wiki/index.php?title=Williams_WPC#Game_resets

#3 4 years ago

LXL

Isochronic_Frost

Saratoga Silverball

7y 221K 9,392 108 1 1

OP
Quoted from MikieHead:
I know this is not an uncommon issue and have read multiple theories. I have done the low hanging items, like re-seating the power cables. Before I pull the power board and start reflowing solder or replacing capacitors I am hoping someone with more knowledge than me can narrow this down based on specific symptoms.
The game will reset Consistently if both flippers (all 3) are activated at the same time, TWICE in a row.
If both are activated one time, the reset is seemingly random.
My question is, does this point toward the capacitors as it seems that the stress of the double press twice in a row triggers it every time??
One of the capacitors has been replaced with a 35v, so it may have been an issue in the past.
Thanks for any insight/opinions/experience or even just jabbing me for my naive expectation of an easy absolute diagnosis!

This is commonly seen when the 5v is dipping too low because the power supply is weak. A way to troubleshoot this possible issue if you wish to stay cheap is to buy the daughterboard that supplements the 5v to the CPU off the 12v GI, it has an LED indicator if the voltage is dropping.

However there are many other good suggestions and this is not always the case, pinwiki has a list of other possible causes

Post last edited 4 years ago: “Edited and clarified the possible causes and other explanations”

#4 4 years ago

BOB

bssbllr

In Memoriam

Frankfort, NY

10y 75,050 1,730 1

Quoted from Isochronic_Frost:
This is 100% the 5v dipping too low because the power supply is weak

If you have a dmm you could test tp2 for 5v. On the driver board.

#5 4 years ago

BOB

bssbllr

In Memoriam

Frankfort, NY

10y 75,050 1,730 1

https://pinside.com/pinball/forum/topic/machine-powering-down-after-hitting-both-flippers

May have already read through this but if you read down their is a DH with the same problem.

#6 4 years ago

LXL

Isochronic_Frost

Saratoga Silverball

7y 221K 9,392 108 1 1

Quoted from bssbllr:
If you have a dmm you could test tp2 for 5v. On the driver board.

Yes but it’s hard to measure that split second drop when you’re trying to hit the buttons.
Not sure why the downvote TheLaw
Maybe I shouldn’t suggest it so certainly but I had the same issue with the 1995 JM and it was intermittent when 3 solenoids were activated it would reset the game.

I JUST dealt with it so that’s why I’m so confident. These PS are dying at this point and need to be rebuilt.

#7 4 years ago

SMK

TheLaw

Pinside+ Addict

Ann Arbor, MI

12y 162K 48,043 19 30 1

Quoted from Isochronic_Frost:
Not sure why the downvote thelaw
Maybe I shouldn’t suggest it so certainly but I had the same issue with...

Because this issue is far from a slam dunk, it can look exactly the same on 2 same machines and end up being diff'rent.

#8 4 years ago

LXL

Isochronic_Frost

Saratoga Silverball

7y 221K 9,392 108 1 1

Quoted from TheLaw:
Because this issue is far from a slam dunk, it can look exactly the same on 2 same machines and end up being diff'rent.

There, I have amended my previous statement and removed the absolute. I have also added that other suggestions could be plausible as well.
Does that make you happy?

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